The tabs in a Teams channel can be associated with many different forms of data. When you delete a channel, you only remove the conversations for that channel. Any other data is left intact, including files in the folder in the SharePoint site used by the team. To fully clean up a deleted channel, you must therefore check what tabs exist and what data is accessed through those tabs.
If you’re interested in deploying backups for SharePoint Online, you might be doing so to prevent data loss through accidental user deletion. However, Office 365 retention labels and policies can help prevent accidental deletion too. And the best thing is that retention policies and labels are part of Office 365 E3, so you don’t have to pay more to get protection.
The Exchange Online Managed Folder Assistant (MFA) runs in the background on a workcycle basis to make sure that mailboxes are processed at least once a week. Most of the processing involves mailbox and Office 365 retention policies and runs smoothly, but how do you know what MFA has done?
Knowing how retention policies process Office 365 data can be hard to understand, especially if multiple policies are involved. Office 365 doesn’t give a global view of how retention policies affect workloads, but here’s how to use PowerShell to find out what policies process the sites in a tenant.
A question asks how to remove a bunch of emails from a shared mailbox. You can use OWA to do the job, especially with its Cleanup Mailbox option, but perhaps some administrative action is needed.