All the communications and data transfers between the components of the product are SSL-encrypted

All the communications between the components of the product are SSL-encrypted

Check the logs to make sure the backup has been created successfully

The problem is in incorrect SSL certificate generation for intercomponent connections of Acronis products. As workaround, try disabling SSL encryption

Setting up E-mail notifications


Why do I get the following error? TCP/IP Secure reports : error1407609C:SSL routines:SSL23_GET_CLIENT_HELLO:http request:s23_srvr.c:385: (6776)


This error can occur if your SSL protocols are not matched up. To verify these settings first check the SSL encryption level for Incoming calls on the MassTransit Server.

    From the MassTransit Administrator -


When using the TCP/IP Secure communication method between two MassTransit entities, the following error message may result, following a failed connection attempt: TCP/IP Secure reports: error: 1408A0C1:SSL routines:SSL3_GET_CLIENT_HELLO:no shared cipher

All communications between agents and Acronis Storage Node are encrypted (SSL protocol). To disable encryption and increase backup speed, especially on fast networks (10Gb+) please use this manual.

Do not disable SSL if one of the following conditions is met:


Remote agent installation or auto-update fails with the following error:

Certificate from <DC address> did not pass the verification. certificate verify failed

After you have disabled SSL 3.0, TLS 1.0, TLS 1.1 and left only TLS 1.2 running on the machine, application-aware backup of an SQL server finishes with a warning:

Error code: 4358
Module: 87
LineInfo: 0xEC865955C73BB27A
Fields: {"$module":"aavb_mssql_backuper_vsa64_11010"}
Message: Failed to collect the metadata of the SQL Server databases selected for backup. The databases will not be backed up.

If you try to edit of specify credentials for an SQL server user, you get these errors:

Cannot collect the metadata of Microsoft SQL Server
The specified user is not a member of the sysadmin role in SQL Server instance 'Instance_name'.
Cannot collect the metadata of Microsoft SQL Server
Cannot back up the SQL Server instances due to environment issues.


1. You have Acronis Management Server Update 2 (b27009) installed on Windows 2016 which is in domain (Domain Controller is also Win2016);

Use cases

  1. Your company's network has tight security, that incorporates firewalls or deep packet inspection software which interferes only with encrypted traffic. In this case, Acronis Connection Verification Tool will report the connection to be successful, yet the backup will fail. Once an unknown certificate is present in the chain, Acronis Storage rejects the connection.
  2. On MacOS, there is no Acronis Connection Verification Tool yet. OpenSSL can be used as a replacement for it.
  3. License sync with Acronis Account fails. 


Backup to Cloud storage fails with:

Failed to establish connection with cloud storage

Could not perform SSL_write() call


This article provides troubleshooting steps for issues with backup to Acronis Cloud storage using Acronis True Image and Acronis Cyber Protect Home Office


1. Backup to Acronis Cloud fails.

2. When you click on the red X or || icon to see details, one of the following messages is shown: