No, Outlook doesnt offer such functionality. You can mimic something similar via Mail flow rules, but they are not really a solution. If you really need this, best consider third-party add-ins/services.
Automated signature switch when an email is within the company or outside the company
Is there anyway to automate a signature for out of company emails vs inner company emails without using a 3rd party company in Outlook?
Outlook | Windows | Classic Outlook for Windows | For business
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Vasil Michev 119.5K Reputation points MVP Volunteer Moderator
2021-06-22T14:02:47.87+00:00 -
Jade Liang-MSFT 9,986 Reputation points Microsoft Employee
2021-06-23T02:37:02.717+00:00 Hi @Carrie Philbrick ,
Agree with michev, there may be no option that could switch signature automatically in Outlook.
Then I have researched a lot about it and found a relevant articles that mentioned a similar script. According to my test on Outlook, it could identify the addresses of different recipients and insert different signatures according to the addresses. As a suggestion, you could refer to this script and modify it for your need if it's possible:
How To Automatically Change Signature Based On Recipients In Outlook?
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