Microsoft Word is correct, it is slightly stilted, and may sound a little bit grandiose, or too-formal, or just a little "off" - because of the passive voice, and also the "wordiness" (too many words).
A natural thing to say in informal or conversational speech is:
I'd love to attend your institution...
I'd love to visit your institution.
In very formal communication:
At your convenience, I would like to visit your institution...
The first one is actually OK in most business or academic situations in the US at present, however. (If you use the second, continue the sentence with the reason you want to visit or what you want to do there rather than ending it after 'institution'.)