Currently accepting a Calendar invitation received in an Outlook/ Exchange/ Office 365 account from inside the native Calendar app of iOS deletes the invitation email.
This issue occurs only on Outlook/ Exchange/ Office 365 type invitee accounts (and not sender's) since only they generate the...
Accepting a Calendar invitation received in an Outlook/ Exchange/ Office 365 account from inside the native Calendar app of iOS deletes the invitation email from Inbox.
Microsoft does provide this feature (non-deletion of invitation email) in its own Client. Outlook for iOS does not delete the...