For some reason, about is rarely seen in business writing. Is it thought to be too common, too ordinary? I have no idea why it is shunned, but I’m encouraging you to rediscover its charms.
Here are the words you love to use in about’s place:
With regard to (not with regards to; regards are what you give to
With respect to, In respect to
In reference to
These all tend to sound extremely formal. Most of your business writing should be in a conversational voice, the way you would talk to someone sitting across your desk from you. Don’t be afraid to sound human. Your writing will be clear, and people will enjoy reading what you write.