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A gentle reminder to all that please look after both your personal and company asse, particularly when you are at client sites or on business travel. The company insurance doesn't cover all loss, especially during business travel.

A gentle reminder to all of you that please look after both your personal and company assets well, particularly when you are at client sites or on a business travel. The company insurance doesn’t cover all loss, especially during the business travel.

Can someone kindly edit the above? thanks,
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(I always watch my back when I travel.)

The red articles are not correct.

The only grammar problem I see is "that to please look after"

I would write, "A gentle reminder to all employees: Please look after personal and company assets when travelling on company business, or when at client sites. [The] company insurance doesn't cover all losses, especially during business travel.

I think in an insurance context "losses are usually thought of as countable, as to types of losses. It might be uncountable as to amount of loss.
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Simply, "travel" is not countable as you have used it.

Business travel is more hectic than leisure travel, not "The business travel."
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Why no red articles before these terms? please explain
 BarbaraPA's reply was promoted to an answer.
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Grammar Geek
Simply, "travel" is not countable as you have used it.

Travel is a rather tricky word. It does not take the indefinite article (a/an) but it can be used in the plural. John Steinbeck wrote a book entitled Travels With Charley. Also, there is another book called Gulliver's Travels.

CB

Absolutely - that's why I said "as you have used it."

But even so (and I did enjoy reading Gulliver's Travels) you would not refer to "The travel when he met those horse people" or "The travel when he was on that floating island."