Invalid Exchange Server version

Challenge

Backup jobs in Veeam Backup for Microsoft Office 365 fail with the following error:

[Timestamp]   14 (5696)   No folder hierarchy changes
[Timestamp]   14 (5696) Preparing folders for items processing...
[Timestamp]   14 (5696) Error: Invalid Exchange Server version
[Timestamp]   14 (5696) Stack:
[Timestamp]   14 (5696)    at Veeam.Ews.ExServices.GetExchangeServerVersion()
   at Veeam.Ews.ExServices.get_ExchangeServerVersion()
   at Veeam.Archiver.Source.MailboxActivator.PrepareFolders(IMailboxContext bind, ExFolder top, ExcludedFolders excluded, CancellationToken cancel)
   at Veeam.Archiver.Source.MailboxActivator.DoMailboxWork(CancellationToken cancel)
   at Veeam.Archiver.Source.MailboxAction.DoWork(CancellationToken cancel)
[Timestamp]   14 (5696) Mailbox processing failed: user@domain.com

 

Cause

This is a known issue in Veeam Backup for Microsoft Office 365 version 1.0.0.912.

Solution

A hotfix can be obtained from Veeam Support to resolve this issue. Please open a support case and refer to this knowledge base article.

More Information

If you need help opening a support case, please click here.