O365DelegCalMgmt

Overview

This utility is a standalone PowerShell script that presents a TUI to the user. Built around Microsoft Office 365 PowerShell cmdlets, its purpose is to simplify delegated calendar management. It takes a frequent 5 minute task and accomplishes it in 5 seconds. As usual, here's the relevant xkcd.

Requirements

Since Microsoft has begun phasing out basic authentication to Office 365 tenants, it is necessary to use the new "Modern Authentication". This method requires a working web browser to sign in to your O365 tenant. In addition that, PowerShell 7 is now required by the EXO-V2 module provided by Microsoft. Make sure to execute this script from the v7 shell window - otherwise it will not work!

• Get PowerShell 7+ from here: PowerShell Documentation
• EXO v2 Module documentation: https://docs.microsoft.com/en-us/powershell/exchange/exchange-online-powershell-v2?view=exchange-ps

How it works:

• Open PowerShell prompt, navigate to directory that contains the script and execute .\Manage-DelegateCalendarPermissions.ps1
• Connects to O365
  • Make sure to use youremail@yourorg.com for the username (when connecting)
• A TUI is presented with four options:
  • Add
  • Check
  • Remove
  • Exit
• Changes are made upon pressing enter, limited error handling is in place to catch any incorrect usernames
• If you want to abort a change, just type exit and press enter (it'll throw an error, but will safely abort)
• When changes are finished, type exit
• The utility will attempt to close the O365 session, however you can do this manually if you type Get-PSSession and remove the correct session ID using Remove-PSSession

Additional Notes

If your O365 environment requires using a different URI to connect to it (such as Government, Germany, etc.), this will not work out of the box for you. You'll need to edit the Start-O365 function to use the correct URI. Check the Microsoft documentation for more details on this.