You can review new meeting time proposals from invitees and either accept them or propose a different time. Note that your administrator must enable this feature before you can use it.
Open the new meeting time request email message.
Do one of the following
Tap Show in calendar and either tap Send, or move the meeting to another time and tap Send.
Tap Accept > Yes.
If there were multiple new time proposals, after you make your choice, the other proposals disappear.