Thank you for reaching out.
Based on your question above.
Can I connect an express route circuit in one subscription with virtual hub/wan in another subscription?
The straightforward answer is yes, although please take a note of points below:
- ExpressRoute circuit SKUs Local, Standard, and Premium can be connected to the hub gateway. ExpressRoute Local circuits can only be connected to ExpressRoute gateways in the same region. Please go through connectivity scope for different ExpressRoute circuit SKUs.
- As documented here.
You can follow the documentation here to connect using authorization key and circuit URI.
Hope this helps! Please let me know if you have any questions. Thank you!
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