our customer has requirement of AVEVA Historian 2023 R2, Standard 12,000 Tag and AVEVA Historian Client Desktop 2023 R2, Concurrent User Single. Now customer has query 1)How many tags can be deployed for trend pens on a single window?? 2)Any limitations

For question 1, I found this on page 45 in the AVEVA Historian Client Guide.

There is no pre-set limit to the number of tags that you can have in a trend; however, keep in mind performance limitations for data retrieval for your computer system.

The amount of tags is limited only by the computer's resources.

I was not able to find any information on limits on tag grouping, so it is also likely limited only by the computer's resources.

For question 1, I found this on page 45 in the AVEVA Historian Client Guide.

There is no pre-set limit to the number of tags that you can have in a trend; however, keep in mind performance limitations for data retrieval for your computer system.

The amount of tags is limited only by the computer's resources.

I was not able to find any information on limits on tag grouping, so it is also likely limited only by the computer's resources.