Hi rh.wilds,
Good day.
Thank you for connecting with us on Microsoft community.
I am writing to follow up on this thread.
According to your description under "Outlook / Outlook for Windows / For business" support category, before moving forward, could you please allow me to collect below information to understand your particular situation?
Regarding your title about ""trouble adding my gmail account to Microsoft mail account", initially I need to know whether you are trying to connecting your Gmail email account on Outlook.com account as Microsoft mail or Outlook account or under Outlook desktop application?
I am asking this question because this support category is relevant with Outlook desktop application related scenario. If you can give some more clear or brief information about it so that it can help us to understand your particular situation.
I would really appreciate your kind cooperation and precious time.
Sincerely,
Darpan