We recently had an issue where our security guys inadvertently changed an AAD conditional access policy which resulted in about 650 shared account phones being logged off across the organisation. Many of these phones were safety critical so there was an urgent need to restore services quickly. There doesn't seem to be a way to bulk sign-in multiple phones so each phone had to be re signed-in remotely via Teams Admin Centre. This process took about 10 minutes per phone.
Overall that took over 100 hours of effort with our support team working over a full weekend to restore each phone.
Does anyone know of a way to do this in bulk - Is it possible via some PowerShell magic?