Still, item counts and mailbox size are convenient targets that can make a difference.Worth noting before we get into specifics: these are not hard-coded limits.Compact the Outlook Connector Local Cache File Unlike POP, which stores data in a PST file, Outlook Connector stores a local copy of account data in a local cache file.If you are using Outlook Connector, you can compact the local cache file to improve performance.
This add-in is responsible for converting meeting requests to recurring meetings and creating calendar and contact folders when saving attachments. Go to Tools, Trust Center, Addins and locate the add-in.
If you were following along, you know that Outlook mailboxes run by Exchange Server can slow down if there are too many items in “core folders” – Inbox, Sent Items, Deleted Items, Contacts, and Calendar.
Separately, Outlook performance will suffer if the overall size of the mailbox grows above certain limits.
Important: Some of the information below asks you to make changes to your software and/or usage of them.
We recommend that you discuss these changes with your local IT administrator prior to making these changes.