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Hello,

Please let me know if this sentence is grammatically correct:

I'll check everyone's schedules, and will get back to you.
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No comma, and 'everyone is a singular pronoun. You have several choices:

I'll check everyone's schedule and will get back to you.
I'll check everyone's schedule and get back to you.
I'll check everyone's schedule, and I will get back to you.
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I'll check everyone's schedules, and will get back to you.

There are a few things that I would like to discuss Monday morning, if everyone is available.