SQL SERVER – Error: 14258 – Cannot perform this operation while SQLServerAgent is starting. Try again later
We checked the logs and found that they were using SQLMail which uses MAPI client to send email.
To fix this error, simply change the setting to use Database Mail.
Once it is changed from mail profile to Database Mail then you will be able to run the jobs manually.
For more detailed fix, go to https://ibmimedia.com/blog/53/fix-microsoft-sql-server-error-14258