Create a Rule in the Outlook Web App for meeting requests.
Sending meeting invitations, updates and receiving responses generates many messages. You may want to create a rule that filters all meeting related messages to a specific folder.
Step 2: Select Type in the first box and Invitation in the second box.
Step 3: Select Move to in the first box, and then Select a folder that you want to move the e-mails to.
Press Save at the bottom of the window to save your new rule.