Unable to run a migration or Apply changes to the Exchange section of Migrator Notes to Exchange (MNE).
Checking the notesmigmgr.wlog shows the following error:
14:43:21.201(1b20:1790) DEBUG: InitializeMapiHttp - Requesting the MAPI/HTTP mailbox URL with Autodiscover.
14:43:21.248(1b20:1790) ERROR: [0-239-10-80131500] System.AggregateException: One or more errors occurred.
14:43:21.248(1b20:1790) System.Security.Cryptography.CryptographicException: Key not valid for use in specified state.