Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello Donna Whitaker
Thank you for reaching out to Microsoft Q&A forum
I can see that in the title of this thread you are talking about installing Microsoft 365 on laptop and phone. So, I would like to ask what type of issue you are facing when installing Office 365 on your laptop and phone?
Next, about your issue with calendar event. Are you referring to Outlook calendar event on your laptop and iPhone?
If yes, then here is a solution I found that could help you:
In Outlook iOS: Tap your profile/initials > Settings (gear icon) > select the account > Reset Account.
This will refresh the local sync store which can fix issue with Outlook iOS when one device stops reflecting changes from another.
Here is the thread of a user with similar issue for you to read more about their solution to this problem:
If you need more assistance, feel free reply back to this post. I'll be happy to help.