Caller wants to know why her and her sister's phones are so slow. While their husband's are faster. Leo says if both you and your sister are using a specific app, that could be running in the background and slowing things down.
She also has an issue where in Office 365, the font size is so small, she can't read it. Leo says you can change the font. It's in the settings. But the caller says they've taken that option out of Outlook in Office 365. Leo says that can't be.
Absent that, change the zoom. That'll at least let you read it.