Hi @Matlock67 ,
Thanks for your feedback above which shared more information and glad to know that your issue is resolved now! Since our forum has the policy that The question author cannot accept their own answer. They can only accept answers by others, and according to the scenario introduced here: Answering your own questions on Microsoft Q&A
I would make a brief summary of this post so that other forum members could easily find useful information here:
[Activating lagged copies - Summary]
Outlook Calendar List view - Duration field stopped calculating
Perform an advanced search, then add the duration filed:
Step1: Search Tools> Advanced Find
Step2: Type test in Search for the words box and click on Find Now.
Step2: Right-click on any field and select Field Chooser, drag Duration to add a column.
Step3: The search is complete:
You could "Accept Answer" for this summary to close this thread, and your action would be helpful to other users who encounter the same issue and read this thread. Thanks for your understanding!
If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.