Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello @Mohammad Rashid
I can certainly appreciate how vital it is to have your business communications restored after transitioning.
In this case, I would like to clarify something to see if I can suggest anythings to help you move forward:
1/ Are you signing into the same Microsoft 365 account as before, or did you create a new one after getting the domain back?
2/ When you try to log in to your Microsoft account, what is the exact message you see? For example, does it say the account does not exist, or is it asking for a password you no longer have?
3/ Are you using the exact same domain name as before (the Sunday Solar one), or did you register a brand-new name for your business?
4/ Do you know if your Microsoft 365 subscription was purchased directly from Microsoft, or was it bundled through the previous company that held your domain?
If you still need my assistance, please come back with screenshots or any additional details so I can review it again and see if there’s anything more I can help you with.
Have a nice day!
If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in "our documentation" to enable e-mail notifications if you want to receive the related email notification for this thread.