Exchange 2013 cu21
so i have “full access” and “send as” delegation and it works. then a few weeks later i started getting
“This message could not be sent. Try sending the message again later, or contact your network administrator. You do not have the permission to send the message on behalf of the specified user. Error is [0x80070005-0x0004dc-0x000524].”
and the only workaround i have is to resend an old email.
how does one fix this error?