When the MS Office AddIn for Outlook is running slow, there are ways to work out what may be causing the issue.
Each time Outlook starts up, the Nimbus AddIn will look at the Outbox to ensure that all messages have been sent, and if required, saved to Nimbus.
In the event where a message has not yet been sent (for whatever reason), Nimbus will wait for it to send, so that it can store a copy of the message in the Nimbus system.
Initial Instructions
When Outlook has loaded, open the Outbox to ensure it is empty. If it is not, you can work on the messages that have not yet been sent, by opening and adjusting the message, or deleting the message.
If this DOES NOT resolve the slowness issue, please refer to the following detailed instructions:
On the PC which is experiencing the issue, open Windows Explorer
Navigate to the following path:
Windows 10-8: C:\Users\User Name\AppData\Local\Nimbus\Cloud Document Management - CDM\Temporary Data
Search for any / all files that end with “JSON.txt” in ALL sub-folders. Once located, you will also find that there will be a matching file with the extension of .msg, which is the outgoing message.
If the message is not in your Outlook Outbox, please delete both files (with the JSON.txt and .msg extension).
Log out of Outlook and then restart Outlook.
Ensure that MS Office Outlook is not accessed in anyway whilst the above is carried out.