Office365 delegated access (Open another mailbox) is currently experiencing intermittent access. Users may be unable to access shared mailboxes in Outlook on the web. "The custom error module does not recognize this error."
Users accessing shared mailboxes via the Outlook client are not impacted.
Microsoft is aware and is currently investigating.
We will keep you informed of any future updates from Microsoft.
OneHelp Reference Number: INC0040245
Services Affected: O365 - Outlook Web App
For more information please contact the IT Service Desk on 02 9850 HELP (4357) Opt 2, or email firstname.lastname@example.org