For the following text:
The input shows an invalid red error box if the maximum number of active participants ___ exceeded.
What should go in the ___ ?
Some options that I can think of are:
I am curious if there is an option above that is incorrect grammatically?
You can use either word, but if you use has, you need to make a slight change.
If the maximum number of active participants is exceeded.
If the maximum number of active participants has been exceeded.