Mimecast authentication changing to Okta
Posted: Wed 28 Jan 2026, 2:47pm.
We are changing the authentication of Mimecast to use Okta from tomorrow (Thursday 29 January).
This means that when you log in to Mimecast you will be presented with an Okta login, which looks like this:
There should be minimal impact as we have tested this thoroughly. However, if you have any issues logging into Mimecast please do contact the IT Service Desk.
Subscribe to our latest news mailing list to receive email alerts of updates.