Excel user enter a store # to query Access data base

[liem]

I have a file when the user enter a store # 13315 and hit a update button
the marco will go to access data base to query this store and bring back
data. we found out if there was more than 5 users from 5 different location
the error will cause the spread sheet do not return data.
How can I write a message to pop up warn the user if more than 5 user query
the data base they have to wait for a minute before they try to update


thank you

liem pho