A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi Mészáros János1,
Thanks for your post in Microsoft Community.
First formula: It appears that you are trying to detect whether a cell contains both the "@" and "." characters, and this formula looks correct.
Second formula: The ISTEXT function is used to determine whether the value in a cell is of type TEXT. If you want to restrict a cell so that it only accepts text input, you might consider using the Data Validation feature.
For example, I restricted input to only 1-2 characters of text.
When I attempt to enter more than two characters, the input cannot be completed.
Please share more context and a screenshot of the complete worksheet so that I can better understand your issue, and I look forward to your reply!
Best Regards,
Thomas C - MSFT | Microsoft Community Support Specialist