If you need to disconnect Entra AD Connect, there is a simple set of commands to do it. Connect to Microsoft Graph with the appropriate permissions scopes. Check the current status. Disconnect Entra AD Connect.
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Empty all first and second stage SharePoint Online recycle bins
This script will get all the site collections in SharePoint Online and empty the recycle bins.
Bulk delete all files from OneDrive
There are times when you need to bulk delete all files from a number of users OneDrive, such as after a migration that has had some unexpected results and it is easier to start again. This script:
Best Practise – Hyper-V Cluster VM Automatic Stop Action

In a Hyper-V failover cluster environment, the best practice for the “Automatic Stop Action” setting is to set it to “Turn Off the virtual machine.” This recommendation may seem counterintuitive at first, but it is crucial for ensuring high availability and proper failover functionality within the cluster. Why “Turn Off”…
BPA (Best Practise Analyzer) Result: Short file name creation should be disabled

In addition to the normal file names, the server is creating short, eight-character file names with a three-character file extension (8.3 file names) for all files. Impact: Creating short file names in addition to the normal, long file names can significantly decrease file server performance. Resolution: Disable short file name…
File Archives to Azure Blob Storage
Get Document Library storage and items summary report for all SharePoint Online Site Collections

Script to enumerate all site collections and subsites in a tenant and get the storage and item count stats on all document libraries.