Subtitles and Captioning
The Royal National Institute for Deaf People (RNID) estimates that in the UK there are almost nine million hearing impaired people. Approximately 28% of people who are hearing impaired are between 16-60 years of age, and 72% are over 60 years of age. So subtitles/captioning are crucial for a significant number of people and need to be viewed as essential not an optional extra. They are also helpful for people who may be joining from an environment where there may be a lot of background noise.
Visuals
If you are using visuals for your meeting please consider how someone who is unable to see the screen can action these. Are you able to give a spoken description to support the images?
Zoom
The makers have a good guide to the accessibility aspects of Zoom and a tutorial on Closed captioning
Teams
Microsoft provide info about the accessibility aspects of Teams and their own tutorial on Closed Captioning can be found here.