Exchange Online now supports a custom recipient limit for mailboxes of between 1 and 1000. The limit controls the maximum number of recipients a mailbox can add to a message. Think of the fun you could have by setting the recipient limit on manager mailboxes to something small, like 6….
Some Exchange Online mailboxes are quite small (2 GB for frontline users). Tenant administrators might want to monitor mailbox usage to make sure that quotas aren’t unexpectedly exhausted. This post explains how to use a PowerShell script to calculate the percentage of mailbox quota used and highlight the problem if a threshold is passed.
Microsoft has announced that basic authentication for multiple email connection protocols won’t be supported after October 13, 2020. You won’t be able to connect with EWS, EAS, IMAP4, POP3, or Remote PowerShell unless you use modern authentication. There’s just over a year to prepare, but there’s some work to be done.
Microsoft has confirmed that disconnected Exchange Online mailboxes are not included in the sources scanned by Office 365 content searches, thus clearing up some misunderstandings that might have existed in the field. The bottom line is that if you want to search mailboxes that don’t belong to accounts, you should use inactive mailboxes.
Exchange Online allows users to add personal retention tags to their maiboxes through OWA settings. Some organizations don’t like this, so they can deploy user role assignment policies to block the feature. It;s something that you could consider doing if you’re preparing to switchover to Office 365 retention policies to impose the same retention regime across multiple workloads.
Outlook mobile users now have shared mailbox support in both iOS and Android platforms. The work to upgrade the backend service is also progressing and is past 50% rollout. And dark mode is coming too. It’s available in beta today to Testflight users (only for iOS), and it’s also been enabled for some users who run the latest version of the clients.
The Outlook Places service is used by Outlook clients to present metadata about meeting locations to users. Currently, OWA is the only client that consumes the service. You can update location metadata with details to make it easier for users to select the right location for their meeting, including geocoordinates that can be used to display map directions to the location.
A question about how best to set auto-replies for Exchange Online shared mailboxes to respond to messages arriving during a public holiday gives another chance for PowerShell to show how useful it is. You could do the work with Flow, but PowerShell is more flexible and capable when dealing with multiple shared mailboxes.
Teams does a good job of storing compliance records in Exchange Online mailboxes so that the data is available for Office 365 eDiscovery. But the number of records can impact the mailbox quotas of frontline workers, especially if they send graphics in personal and group chats. Here’s some PowerShell to help discover how much mailbox quota is being absorbed by compliance records.
Removing Office 365 accounts is easily done through the Admin Center. You can also restore deleted accounts within 30 days, but what if you want to remove accounts in such a way that they can’t be restored? The answer is that it can be done using a two-stage process. And if the mailboxes belonging to those accounts are on hold, they are kept as inactive mailboxes.