Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Deborah C,
I go through the post carefully, may I know if you are using Planner app from browser? If so, you should see horizontal scroll bar in a plan at bottom of the page, as you can see screenshot below:
Also you may use Left/Right arrow key on keyboard to scroll horizonal, if you Zoom out the page, you may not see the bar. Additionally, to check if the issue related to your browser, please open the page in inPrivate window or in another browser and check the result.
If the issue persists, could you please share a screenshot on what you see with us? And may I know does the issue happen on all plans?
Regards,
Clark