Hello, I am looking to setup a 3cx system in the cloud for multiple countries. What I can't work out is the best topology for this. So, I have offices in UK, PL, NL, DE, FR, RU, VN Do I setup a PBX for each office and then use the bridge function to link them together to get the dial by extension, presence information etc... Or do I setup a single PBX and use SIP providers from each office location to get the local numbers etc... Are these even valid configurations? I understand that multiple PBX's would provide some redundancy. We want to achieve - Local numbers for each country, dial by extension between offices, a common directory across all offices linked to Office 365. Any help or recommendations will be greatly appreciated.