The reason you are getting a 403 error is because you’re not sending the call from a Skype Connect account.
Skype Connect uses the From header, which should contain <SIPusername>@sip.skype.com to resolve which account is making the call, for example:
From: <sip:firstname.lastname@example.org >
where 9905100000xxxx is the SIP username.
If the From header does not contain the SIP username and sip.skype.com domain, we cannot find your account and will forbid the session to take place, that is the call will fail or be rejected.
Why has this not helped?
Please let us know why we couldn't help you today
Thank you for your feedback
Thank you for your feedback Thank you for feedback! For further sources of help, you can always search or read answers to questions in our community. Visit the community
Join the conversation with other customers.
In training to help with Skype.
Our support team is ready to help.
What would you like to tell us about Skype?
Share your ideas with a quick survey.
Check if there are any issues currently affecting Skype.