Azure DevOps is already replicated across multiple Azure Data Centers for fail overs. They did this after the south east data center hosting Azure Devops (then VSTS) went down for a few days, bringing down the service. By going with a cloud provider, this is one of the benefits you (assume) you get. Automatic (geo)replication/redundancy of SAAS products. You don't have to manage this, but if something goes wrong, you have no control (or responsibility) to fix it.

Which is the initial starting point for your DevOps organizations/projects. There may come a time where you will need to scale these organizations/projects. One common use case is to ensure that when a primary data center that has one of your services running fails your organizations/projects remain up because there's another data center still running your service in efforts of ensuring accessibility is higher than 99% at any given time. Azure offers Availability Zones, which helps scale and replicate your organizations/projects across multiple data centers.

Azure DevOps is already replicated across multiple Azure Data Centers. They did this after the south east data center hosting Azure Devops (then VSTS) went down for a few days, bringing down the service. By going with a cloud provider, this is one of the benefits you (assume) you get. Automatic (geo)replication/redundancy of SAAS products. You don't have to manage this, but if something goes wrong, you have no control (or responsibility) to fix it.

Azure DevOps is already replicated across multiple Azure Data Centers. They did this after the south east data center hosting Azure Devops (then VSTS) went down for a few days, bringing down the service. By going with a cloud provider, this is one of the benefits you (assume) you get. Automatic (geo)replication/redundancy of SAAS products. You don't have to manage this, but if something goes wrong, you have no control (or responsibility) to fix it.

Azure DevOps is already replicated across multiple Azure Data Centers for fail overs. They did this after the south east data center hosting Azure Devops (then VSTS) went down for a few days, bringing down the service. By going with a cloud provider, this is one of the benefits you (assume) you get. Automatic (geo)replication/redundancy of SAAS products. You don't have to manage this, but if something goes wrong, you have no control (or responsibility) to fix it.

Which is the initial starting point for your DevOps organizations/projects. There may come a time where you will need to scale these organizations/projects. One common use case is to ensure that when a primary data center that has one of your services running fails your organizations/projects remain up because there's another data center still running your service in efforts of ensuring accessibility is higher than 99% at any given time. Azure offers Availability Zones, which helps scale and replicate your organizations/projects across multiple data centers.