As instructed by Mr. X, we have removed file cabin with archive from old office and placed in the new office. Upon checking the archive, the following documents were found.
It's not clear what is meant by "with archive". This suggests that something was attached to, or in some way part of or associated with (as if a separate container or cabinet); or something inside the cabinet, such as archived documents?. Can you explain that part in simple words?
Otherwise, the sentence is:
As instructed by Mr. X, we (have-omit) removed the filing cabinet ........with archive .....from the/his old office and placed it in the new office. Upon checking the .....archive, ......the following
- if you say 'following', then it implies you are going to list the names of the documents found. Otherwise, if this is a covering letter, and you are sending the documents to him, you would say, 'enclosed'
documents were found.
Student or Learner