Update item for a multi line text field in SharePoint Online with the field option "Add changes to existing text" doesn't work

Hi ​@Marion,

Welcome to the community.
Unfortunately, Nintex Workflow does not support a SharePoint Multiple lines of text column with the append feature turned on.
This is not necessarily unique to Nintex, as you will find that most queries from any application or PowerShell, etc will only return the last appended entry.

The reason for this is because of the way SharePoint stores these entries.
Any new entry is stored in the item version. SharePoint reads all the versions of the item and then displays them on the form. This is why the column will generally show a URL rather than the entries. This URL points to a query for the entries.

Example: <a href="https://yourtenant.sharepoint.com/Nintex/_layouts/15/listform.aspx?ListId=%7B5A36BA05%2D1196%2D41EC%2DB237%2D0E404363C74C%7D&PageType=4&ID=4">View Entries</a>

I would disable this feature and then go with the method you suggested, where you first read the current entry and then build a string with the current entries and the new entry.

Hi Simon,

Thanks for your reply and the explanation why I get the described effect. I will go on with the suggested method and keep this information in mind for future projects.

Marion