If you’re using non-federated identities with Office 365 for education you will find that by default password expiry is enabled, meaning every 90 days you’ll be required to pick a new password. While the duration of this is not configurable, it is possible to disable the feature for some or all of your users.
For an individual user:
To disable password expiry for an individual user, run the following code:
For example, if your user’s UPN is email@example.com the code would look like:
For all users:
To disable password expiry for all of your users, run the following code:
That’s it! Now your users won’t be prompted to reset their passwords after 90 days.
If you’re looking for a more advanced scenario where your passwords are managed by your local Active Directory then take a look at federated identity in Office 365 with Active Directory Federation Services 2.0 – a server role that enables you to authenticate against your AD for access to Office 365 for education.