Unable to add a new mail sync job - error saying server configuration information is missing.
When attempting to add a new mail sync job, a pop-up error appears:
"Cannot create a job with server SERVERNAME because necessary configuration information is missing for the server. Try to refresh the server information".
Refreshing the servers in the console has no effect.
It has been found that re-adding the relevant organization to the console, causing a full re-enumeration of the organization, will resolve this issue.
To do this, right-click "Target Exchange 200x Organizations" (or "Source Exchange 200x Organizations" depending on where the problem lies), & select "Add Target Organization" (or "Add Source Organization") then complete the wizard to re-register the organization.
It is not necessary to delete the relevant organization from the console first.