SharePoint and Citrix



I have something very strange going on. I have created a sheet (View Only) and have published the sheet (Only available to users in the owner's account) via SharePoint for my end users to use. Most of my end users access this sheet via Citrix login. Over the past couple of weeks, random users will indicate that they no longer have access. In looking at their account in User Management, they are an Active user and I can see that they have been successful logging into the sheet.

Thoughts on why this might be happening? In order for them to regain access, I have had to delete their account in Smartsheet then re-add them. After I re-add them they are working fine.