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Office 365 Backup, Veeam

Veeam for Microsoft 365 Invalid Serialized Stream, Unknown Opcode Found:4 error

A recent Microsoft change to the Serialized Property of Exchanges items have caused “Invalid ‘serialized stream, unknown opcode found: 4’” errors across Veeam for Microsoft 365 users. This issue has been resolved with new hotfixes for users on versions 7.0.0.4551 and 7.1.0.1401. Below are the KB links to download the hotfix that pertains to your environment: Hotfix for 7.0.0.4551 P20231218 Hotfix for 7.1.0.1401 P20231218 To install the hotfix, follow these quick steps: If you continue to experience the error, would like assistance with the hotfix, or have any other backup replated questions, please reach out to Support@Managecast.com.

Veeam

Veeam “Unable to connect to SMTP server because of invalid credentials or connection settings”

From time to time, there are changes and updates to your SMTP server that may adversely affect you nightly reports. Your jobs will start throwing Sending e-mail report warnings that Veeam is “Unable to connect to SMTP server because of invalid credentials or connection settings” and/or “the remote certificate is invalid according to the validation procedure.” Resolving the SMTP warning is quick and easy as long as you know where to look. Here are the quick steps to checking and re-accepting the SMTP certificate: There may be other reasons that could be interrupting the communication between your Veeam backup server and the SMTP server. If you would like further assistance please contact Support@Managecast.com.

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