Thanks for all the clarification, Alison. So we know with certainty that the time is off for about ±1 hour, and something along the process of sending and receiving emails is causing the time stamp to change.
Also, this affects calendar invites and emails which are two are very different features. This begets a few questions:
- Are you using Office 365 for Education or Office 365 for Business?
- Is your device provided by Cambridge University Press?
- Is your email domain using IMAP, POP, or Exchange?
To make things more efficient, please check if the time zones for these three are synced:
1) Outlook Web App.
First, head over to Outlook Web App. Once there, do one of the following:
Go to Settings > Options > Settings > Regional or
Go to Settings > Options > General > Region and time zone.
2) Outlook 2016.
Here's how you can get there:
- Click the File tab.
- Click Options.
- On the Calendar tab, under Time zones, type a name for the current time zone in the Label box.
- In the Time zone list, click the time zone that you want to use.
3) Windows 10.
In Cortana's search box, type "Change the time zone" and click the result. Here you can check what time zone your computer is on.
We'll be waiting for you response.