When adding an On-Prem or Hybrid organization to Veeam Backup for Office 365 we get the following error:
The On-Premises Exchange server does not have Powerhsell authentication enabled.
On the On-Premises Exchange server, you need to enable Basic Authentication (See Below)
- Open the Exchange Admin Center and Click on Servers
- Choose the Virtual Directories tab
- Click on Powershell (Default Web Site) or Powershell (Exchange Web Services web site)
- Choose authentication
- Enable “Basic Authentication”