132 votesDIV commented
Unhelpful suggestion because it is lacking in detail — much too vague.
32 votesDIV commented
This seems like a very niche request.
The quick workaround would be to simply turn off the "Capitalize first letter of sentences" feature under AutoCorrect that is automatically changing those words (and then remember to add capitals yourself when starting a sentence).
Alternatively you _might_ be already able to add such brands to the list of words to be replaced in the existing AutoCorrect options [just as "(c)" gets converted to "©"]. I'm not sure whether this will work, as it would create a 'conflict' between AutoCorrect actions, and the outcome depends on which autocorrection is performed first.
By the way, before requesting the feature, did you enquire on Microsoft TechNet for any suitable workarounds?
Another workaround could be to write a simple VBA macro yourself.