Cross-platform identity management

[NK2000]

I want to be able to access thirty bees and some other system with the same credentials. What is the right approach in thirty bees to integrate identity with 3rd party systems?

[Traumflug]

This would require substantial changes to customer and employee handling. Especially if it had to fit a random "some other system". AFAIK there is no gold standard for user handling, each web software uses a custom solution.