Get an error "Unable to access an account or mailbox" no matter using delegate access or impersonation RRS feed

  • Question

  • i am trying to access a mailbox using EWS api.

    i use a global admin with application impersonate role to access the mailbox, it failed and return an error "Unable to access an account or mailbox"。

    use the global admin i can access all the mailboxes but this one. I am very confused, don't know what's special about this mailbox.

    I assign the global admin full access rights to this mailbox, and try to use this via powershell or EWS api to access the mailbox, it falied again.

    But i can access the mailbox using its own account

    Anybody know why i cannot access this mailbox using other account. I am very sure that the code i used has no problem, because it works on other mailbox.

    Wednesday, July 8, 2015 6:31 AM