A cloud provider/partner we use for our M365 backup did a recent upgrade and maintenance. Since that time, our VEX will no longer connect to the service provider. I can add the service provider in VBR (v. 12.0.0.1420 P20230412) with no problem. Re-scanning it works fine too. I can also authenticate in VEX (with modern authentication). However when attempting to connect and start a restore process (the point in time does not matter), it states 'Connection failed.' Error in VEX logs state:
For this sort of issues we need the cooperation of the cloud provider. We cannot troubleshoot the issue without log files from both sides. For this error you must open a case with your service provider. The service provider then needs to open a case with Veeam. Because they are the owner of the rental license of the hosted Veeam Backup for Microsoft 365 service. Only the owner of the rental license can open support cases for it.
For your own case with our customer support, please use our Talk to a Manager option if you are unhappy about the status of the case: https://www.veeam.com/kb2320
Thank you for the information Fabian, I will use the contact a manager option. If there is a resolution, I'll post it here in case someone else runs into a problem.