Common Issues
This section describes issues which are seen in the field more often, possible reasons and mitigations.
Hybrid Auth WSMAN-MultipleClientMessages (Certificate issue)
When adding a hybrid organization you get the following error when validating the organization in the wizard:
WSMan-MultipleClientMessages - The WS-Management service cannot process the request
This is an issue with certificate authentication and can be either solved by disabling legacy protocols or by configuring on the Exchange server IIS > Default Web Site > PowerShell > SSL > and select "Client certificate: "Ignore" radio button
HTTP proxy config
You might need to configure a HTTP proxy to be able to connect to the internet but also have the requirement to define a bypass configuration list. This can be done by adding the list to xml config files on the Veeam Backup for Microsoft 365 Server and Proxies. Here is an example that bypasses *.lan.domainA.xy, *.external.com and 10.* :
<InternetProxy BypassHosts=".+\.lan\.domainA\.xy;.+\.external\.com;10\..+" />For details on how to setup the bypass list, please see KB4174.