Veeam for Microsoft 365 What’s unsupported after the deprecation of basic authentication?

Share This Post

After Microsoft’s decision to deprecate basic authentication in favor of modern authentication, there are a few things that will change when switching from basic to modern. Below are items that are not supported through modern app-only authentication, and support that has been added in newer releases:

  • Discovery Search mailboxes (Added in

  • Public Folder mailboxes. (alternatively, Microsoft recommends using Microsoft 365 Groups. Additionally added support for Public Folder mailboxes.)

  • Dynamic Distribution groups.

  • SharePoint Web Parts can only be backed up if their ‘exportmode’ property is enabled.

  • Web Parts by default (to backup Web Parts you must enable the “Allow custom script” option.)

Further information on what is/is not supported when switching to modern authentication can be found here KB3146. If you would like assistance, or have any further questions on what is supported, please email

More To Explore