If your mCloud subscription includes Microsoft Office 365 (Word, Excel, PowerPoint, Outlook and OneNote) you will have to activet your subscription using your @mobieus.com identity.
Sign in to Activate:
Open Excel (or any other Office application).
If prompted, sign in using your Office 365 ID (usually your work or school email and password).
If you're not prompted, click on 'File' > 'Account' (or 'Office Account' in some versions).
Under the 'Product Information' section, click on 'Sign In'.
Enter your Office 365 ID credentials.
Complete the Activation Process:
Once signed in, Office should automatically activate, granting you access to all features.
You may need to follow any additional prompts or instructions.
Check Activation Status:
To confirm that Office is activated, go back to 'File' > 'Account'.
Under 'Product Information', you should see 'Subscription Product' and your Office 365 plan details, indicating that Excel is activated.