Veeam Backup for Microsoft Office 365 upgrade fails with "Certificate is not valid" error
| KB ID: | 4281 |
| Product: | Veeam Backup for Microsoft Office 365 |
| Published: | 2022-02-28 |
| Last Modified: | 2022-02-28 |
Challenge
Attempting to upgrade Veeam Backup for Microsoft 365 using built-in updater fails with error:
Certificate verification failed: Certificate is not valid.
Cause
This error occurs due to a known issue related to the MSI certificate.
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