connecting to SSAS db via SSMS

hello.

days ago, I order to change my SQL server IP to public IP... so I can access it anywhere...

everything went good connecting via excel... because my laptop is out server domain.. it pub up the authentication window

I typed domain\myuser and password... it connected but gave me an error 

The integrated security 'ClaimsToken' is not supported for native connections 

so I opened my odc file and deleted the part of integrated security from connection string.. and it worked fine,

the problem when I tried connecting using ssms...

same error pup up.. but this time I couldn't solve it using active directory password mode

so how can I login via SSMS using out domain device to my public SQL server AS