Archive them.

Signature
Milly Staples [MVP - Outlook]
Post all replies to the group to keep the discussion intact. All
unsolicited mail sent to my personal account will be deleted without
reading.
After furious head scratching, Too many appointments asked:
| Receiving messages from server that inbox is full. Calendar has
| largest size and need to remove old appointments and attachments to
| personal PST file. How can we bulk move items prior to 1/06.