Release date:October, 2021

Table of contents

What's new

Acronis Cyber Protect Cloud

New Licensing for Microsoft 365 protection

New licensing and pricing for Microsoft 365 are now available — pay per seat only, and an unlimited Acronis Hosted Cloud Storage included in the "Per workload" model. This addresses the service providers' needs for a simplified licensing approach for Microsoft 365 instead of the existing standard licensing approach.

Management Portal and Platform Core

"Partner resources" offering items are now enabled by default

"Partner resources" offering items are enabled by default to eliminate the problem with newly created partners being unable to register their own storage or disaster recovery infrastructure. The default behavior of offering items is consistent now — all offering items are enabled for partner tenants by default.

Protection and File Sync & Share services have new descriptions

The description of the "Protection" service contains an explanation that the service includes backup functionality as well. This minimizes the chance of disabling the "Protection" service by mistake and losing backup data.

Each branding setting has a dedicated description

The dedicated built-in description for each setting reduces the time needed to understand the setting.

ConnectWise Manage PSA integration

Granular API permissions control

Granular API permission controls for ConnectWise Manage integration allow increasing the security level for the integration.

Acronis Files Cloud

New languages are available for Acronis Files Cloud: Portuguese language (Brazil and Portugal).

VMware Cloud Director integration

Non-Organization Administrator users support

Free up administrators' time without compromising the security of the Cloud Director infrastructure, by delegating the management of backup and recovery tasks to users without administrator privileges.

Cross-Organization user support

Allow external Identity Provider (IdP) users to access the Cloud Director tenant portal via SSO, and manage backup and recovery tasks for all Cloud Director Organizations they have access to, by supporting integration with external LDAP or SAML IdP for Cloud Director.

New operating systems support

With the C21.10 release, it will be possible to protect macOS 12 Monterey and Android 12 workloads with Cyber protection functionality from day one of the release of these operating system versions.

Tips and tricks

To add an additional layer of protection of workloads, configure password protection of agent uninstallation. See this article for instructions.

Updated Components

Cyber Protection agent

The Acronis Cyber Protection agent has new versions as follows.

  • Acronis Cyber Protection Agent for Windows (v.15.0.28037)
  • Acronis Cyber Protection Agent for Mac (v.15.0.28037)
  • Acronis Cyber Protection Agent for Linux (v.15.0.28037)

See the release notes for the Acronis Cyber Protection agent here.

Changes in Acronis Cyber Cloud API

You can find the history of changes in Acronis Cyber Cloud API in the dedicated API change log document.

Fixed issues

This section describes issues that have been fixed in this update.


For information about security issues fixed in this release, please refer to

Acronis Cyber Protect Cloud


  • [PLTFRM-32887] Inconsistent agent update states after C21.08->C21.09 migration.
  • [PLTFRM-33093] Inconsistent agent update states that preclude completed update tasks processing.
  • [PLTFRM-33195] Installation of the agent using web installer fails due to SSL peer certificate or SSH remote key was not OK error.
  • [ABR-327382] Bootable media doesn't browse Cloud vault when registered by token.
  • [ABR-264121] Cloud connection verification tool does not contain a KB link to the.
  • [ABR-118054] Filesystem check fails with "Cannot get the name of the partition to check" under boot media for FAT32 volumes.
  • [ABR-326686] EPMGR eats all PostgreSQL connections pools.
  • [ABR-319041] Advanced features are required when editing protection plan for the tenant without advanced licensing.
  • [ABR-321502] Request timeout on getting the list of recovery points of the C2C resource.
  • [PLTFRM-33134] Backup to cloud fails with the error "Request to cloud storage '' has failed with code '400'.".
  • [ABR-318900] There are 2 "Cloud Application backups" vaults in the vault manager if you enable both DR and C2C.
  • [ABR-326278] Unable to sync nextRunTime for antimalware when agentID is not provided.
  • [ABR-280879] Support Proxy in Cloud connection verification tool.
  • [ABR-317872] Cloud connection verification tool does not check port 8443.
  • [ABR-326259] Only vulnerability assessment features are displayed in the list of missing features.
  • [AUK-5114] Fix is not applied for vue.js.
  • [DOC-688] Duplicate entries in the TOC of Advanced Email Security guide.
  • [ARC-356] Cannot process incomplete created archive.
  • [PLTFRM-29192] Advanced Email security cannot be used due to new user sync failure.

Cyber Protection Agent

  • [ABR-296612] Agent re-registration fails with error: "failed to validate possible tenant change: no access to tenant".
  • [ABR-317922] In rare cases Cyber Protection Agent сrashes during the installation.
  • [ABR-306919] mms.exe is crashing with 0xc0000409 on MSVCR120.dll.
  • [ABR-317876] "Max Disk Usage Space" value changes to 100% after backup.
  • [ABR-327103] MsiDeleteASZ cause some issues.
  • [ABR-323669] Drivers installed within not valid features.
  • [ABR-325534] Unable to browse recovery points.
  • [ABR-325637] Acronis Startup Recovery Manager becomes deactivated after agent update.
  • [ADP-17356] Remote installation failed.
  • [ABR-326002] Created .mst file contains unnecessary information.

Dashboards and reports

  • [ADP-17353] Widget #CyberFit Score has the wrong limit in electron render mode.
  • [ADP-17279] Monitoring: incorrect ordering "date" groups in the "daily_activity_table" playbook.
  • [ADP-17208] Monitoring: No extended logging for C2C.
  • [ADP-17248] Monitoring: No requests to backup status history.
  • [ADP-17273] Redirection from Dashboard Overview filters does not work.

Disaster Recovery

  • [DRAAS-24080] Context deadline exceeded issue.
  • [DRAAS-24186] Convert VM failed to find an archive with a key.
  • [DRAAS-24083] No context info in the log messages by mntsrv and controller.
  • [DRAAS-24121] Restart loop after failover.
  • [DRAAS-24082] Incorrect log messages in mntsrv.
  • [DRAAS-22135] RuntimeError: Lock is not acquired.
  • [DRAAS-24101] Not possible to find several archives by pattern.

File Sync & Share

  • [ASRV-10690] Issues with email notifications.

Linux protection

  • [ABR-324359] Backup fails with the warning "Failed to detect OS" on windows with LVM disks.
  • [ABR-323040] Modules build issue with 4.18.0-305 kernels.
  • [PLTFRM-31834] Unclear error message and notification process.
  • [ABR-322193] Installer fails to sign modules if several modules exist in the kernel tree.
  • [ABR-324371] Issues under spinlock.
  • [ABR-324599] Issues with mounting ext4 partition with file-filters from archive results.
  • [ABR-322998] Uncontrolled consumption of the memory.
  • [ABR-327481] No fresh install mode support in custom config.
  • [ABR-324702] No possibility to activate periodic ReleaseFreeMemory call.
  • [ABR-326246] No logging for RAM consumed by service_process monitoring.
  • [ABR-322926] No loggштп for tcmalloc.

macOS protection

  • [ABR-325033] Backup sometimes fails with "Operating system error: Illegal byte sequence" while trying to open a file in the user spotlight store.
  • [ABR-297885] Incorrect error in case of disk backup w/o granting full disk access.
  • [KERNEL-11578] High memory usage on macOS for some protection activities.

Microsoft 365, Google Workspace, and other applications protection

  • [ABR-325568] In rare cases agent may crash when performing recovery.
  • [ABR-326354] Tenant name is not updated in accounts table during discovery.
  • [ABR-326831] In rare cases Microsoft 365 Group mailbox backup is failing with an error message: Cannot get the user's email address for connecting to the Microsoft 365 group mailbox.
  • [ABR-327578] Some user mailboxes are not included in "Cloud workloads protection status" widget.
  • [ABR-322498] "Connection reset by peer" issue for some Microsoft 365 backups.
  • [ABR-324485] In rare cases uses the wrong algorithm to access Public Folders.
  • [ABR-324306] Rare issue with the discovery of one drive for shared mailboxes, rooms, and equipment.
  • [ABR-324362] Issue with the backup of a large library.
  • [ABR-323347] Rare issue with multiple protections on one resource.
  • [ABR-325582] In rare cases "Cannot recover the contents" issue can be shown during recovery.
  • [ABR-325615] Issues with messages recovery (400 response code).
  • [ABR-323649] OneDrive backup unexpectedly switched to full.
  • [ABR-323110] Issues with the resumable backup of Team.
  • [ABR-322186] Out of memory issue for backup of the site with a lot of users.

Security and management

  • [PLTFRM-31347] Issue with increasing memory consumption.
  • [ADP-13122] Windows update search process hangs infinitely if request abort doesn't work.
  • [AMP-7358] Microsoft excel and word application crashing after enabling "Exploit prevention option" in the protection plan.
  • [ADP-17042] Issue with moving the detected file into the quarantine after detection.
  • [ADP-12102] Unexpected warning message during Chrome Update.
  • [ADP-16955] Unexpected error for the antimalware scan.
  • [ADP-16745] Issue with detection of already removed apps.
  • [AMP-7348] Antimalware is affecting system performance due to DATEV software is not being added to the exclusions list.
  • [AMP-7172] High memory usage on macOS for some protection activities.
  • [ASRV-10690] Issues with email notifications.

Virtualization protection

  • [ABR-321984] Backup and recovery of VMs on VMware ESXi environments provided by "OVH" provider fails with "Failed to open virtual disk" in some cases. Error from VMware VDDK log: "VMware_VDDK: while parsing HTTP response for method findAllByDnsName".
  • [ABR-322370] Virtuozzo Hybrid Server: The "Configure network settings from guest OS" check box and some other network settings for VM differ from the original values in the restored VM.
  • [ABR-298026] Virtuozzo Hybrid Server: when restoring a backup of a VM, the web console UI automatically suggests recovery into physical machine (Agent for Linux) by default instead of recovery into virtual machine (Agent for Virtuozzo).
  • [ABR-323662] VMware Cloud Director: Management Agent (vCD-MA) doesn't reconnect automatically after restarting RabbitMQ (restart of VCD-MA helps).
  • [ABR-323233] Virtuozzo Hybrid Server: Some VM/Container original parameters are not preserved on the restored CT/VM, including "Autostart", "Autostop", "Autocompact", "VNC config", "Description".
  • [PLTFRM-33092] Registration of VMware Cloud Director agent failed with error "Agent registration failed. Please check OVF parameters".

Management Portal and Platform Core

  • [PLTFRM-32439] Saving changes to tenant's contact details fails with error message "Access denied".
  • [PLTFRM-32838] Enabling of File Sync & Share service for a customer right after disabling it fails with error 400.
  • [PLTFRM-33095] Opening "File Sync & Share" console fails with error message "This Account has not been created yet".
  • [PLTFRM-33243] Incorrect value of "Advanced Disaster Recovery compute points" metric in usage report for period of September 1, 2021 - September 30, 2021 if edition was switched on October 1, 2021.
  • [PLTFRM-33175] Cloud storage usage value is not changing in Management Portal after deleting Microsoft 365 or Google Workspace backups.
  • [PLTFRM-32571] Verification mode of branding-cli tool failed with error "certificate is valid for xxx.local, not".

Autotask PSA integration

  • [CI-13987] Empty list of mapping companies is shown when disable offering Item with generated usage.

Known issues and limitations

This section describes issues that are currently known and provides solutions to avoid the issues where possible.

Acronis Cyber Protect Cloud


  • [ABR-228827] If some backup is removed via the Data Recovery (Web Restore) console, this change is not reflected in the service console while browsing the backup location, until the service console is refreshed.
  • [ABR-196710] The backup location on the network share usage is duplicated in the case when there is a different network share with the same name registered as a backup location (shares rotation scenario).
  • [ABR-189620] The "Activities summary" widget shows activities out of the defined date "Range" scope (excessive activities may be shown).
  • [ABR-184900] Local backup usage is not reported for backups stored on a network share with enabled deduplication.
  • [ABR-183764] Local backup usage is not updated for all virtual machine backups after deleting and re-adding a network location.
  • [ABR-182313] Local backup usage size is duplicated after reconnecting a locally attached storage (LAS) to a new Agent for VMware (Virtual Appliance).
  • [ABR-178648] The installer does not remove/update old libraries if the previous update was interrupted.
  • [ABR-154655] The protection plan may have the "Backup succeeded" status, even if this plan is completed with warnings. Alerts and activities still show the proper status of the plan.
  • [ABR-113452] If a machine was re-registered under a different account without revoking the existing protection plan from it, this plan may still continue to run unexpectedly.
  • [ABR-190404] It is not possible to recover from the Large Scale Recovery backup produced by the "LSR" tool if the backup is split into multiple separate files (multi-volume).
  • [ABR-158677] "Intel(R) 82574L Gigabit Network Connection" NIC is not properly recognized by Windows 10 after recovery of an image to a VMware Workstation virtual machine by using the bootable media.
  • [ADP-17122] Backups Scanning does not work properly with orphaned archives.

Cyber Protection Agent

  • [ABR-87244] File-level recovery from a disk/volume backup of NTFS volumes with the enabled native deduplication does not work.

macOS protection

  • [ABR-207057] The Bulgarian language is missing in the "Recovery HD" menu (bootable media for Mac), due to a lack of support of the Bulgarian language in macOS.
  • [ABR-141823] There are incorrect backup items in a protection plan after updating Mac OS X to 10.13 High Sierra with conversion from HFS+ to APFS (some backup items are missing).
  • [ABR-137886] Backing up Mac with Apple RAID configured fails with the "No volumes were found when processing the 'Fixed Volumes' template" error. Apple RAIDs are not supported.
  • [ABR-115270] The "[All Profiles Folder]" template in a file level backup does not support a custom profile path.

Microsoft 365, Google Workspace and other applications protection

  • [ABR-74984] The "Next backup" time is not displayed for a machine that has only application-level protection plans applied to it.
  • [PLTFRM-18969] It is not possible to protect Microsoft SQL on a machine with a workstation operating system, in the case Agent for Hyper-V is also installed among local agents.
  • [ABR-255521] The number of total runs and successful runs is zero for the Microsoft Office 365 resources.

Virtualization protection

  • [ABR-242166] An application-aware backup of a Hyper-V virtual machine may fail when executing the WMI query, with the "WMI 'ExecQuery' failed executing query." or "Failed to create a new process via WMI" errors, when the backup is performed on a host under a high load, due to no response from WMI.
  • [ABR-235983] A protection plan using policy rules such as "/dev/sdaX" or "/sdaX" applied to a VMware or Hyper-V virtual machine fails with the "Nothing to back up. The operation has been terminated." error, when performed by Agent for VMware/Hyper-V.
  • [ABR-234935] There are duplicated activities in the Activities summary, after the backup of a virtual machine running on a Hyper-V cluster.
  • [ABR-234935] An incorrect number of Total runs/Number of successful runs for a Hyper-V cluster is shown on the Operations tab.
  • [ABR-234935] The number of email notifications is equal to the number of Hyper-V cluster nodes for one VM backup activity.
  • [ABR-192213] VMware virtual machines with an empty "vc.uuid" (InstanceUUID) vSphere property are not listed in the service console.
  • [ABR-189882] Backup of a Hyper-V virtual machine fails if it contains an ampersand symbol in the names of its virtual disks.
  • [ABR-173002] Run VM from a backup on a Hyper-V host fails, if the backup is located on the same volume as the path selected for the mounted VM disks.
    • Solution: Select a different volume for the mounted VM disks path. The space will be consumed only for changes generated inside the mounted VM and it will not occupy the entire size of the virtual disk.
  • [ABR-137564] Cross-platform recoveries (when the backup was created not by Agent for Hyper-V) into a new Hyper-V virtual machine by Agent for Hyper-V always produces the Gen 1 version of virtual machine.
  • [ABR-115430] A "backup is missing for X days" alert is activated even if the backup plan is not scheduled, but has this alert option enabled in its settings.
  • [ABR-104081] A VM replication plan may fail due to network disconnects between source and target ESXi hosts even if the "Error handling" option is enabled.
  • [ABR-85645] Backup of a virtual machine with Active Directory may complete with warning "MFT bitmap is corrupted."
  • [ABR-183082] Recovery of a Linux machine having some volumes with the XFS file system completes with the "Failed to process the boot loader configuration." warning. The machine is bootable despite the warning.
  • [ABR-327505] Changed Block Tracking does not work for convert to VM operations on Scale Computing.

Management Portal and Platform Core

  • The read-only role is available for selection while customer tenant is in Cyber Backup - Standard and Cyber Protect - Standard editions, yet it should not be due to licensing limitations.
  • [ABR-136810] An unclear error is shown if a destination tenant was not found while moving a tenant.
  • [ABR-136694] The "Bad request" message appears if a large number is specified for the Storage quota.
  • [ABR-203902] The error message "The number of registered and deleted storage registrations exceeds 50" is shown during storage re-registration.
  • [ABR-203243] Logout is done correctly while a user is logged in via a branded URL; however, logout is not done for a non-branded URL.
  • [ABR-173628] Active Directory Connector - mapping is not saved when one or more Distinguished Names (DNs) are invalid.
  • [ABR-131711] Lack of salutation text in the "Quota exceeded" email notification.
  • [PLTFRM-2340] The "Tenant was moved" audit event description shows tenant IDs instead of names.
  • [PLTFRM-18229] Improve the error message for the RPC GetRedirect method, in case a customer has no storage.