This may be totally off topic if "Concur Expense Mgmt System" is some outsourced solution which includes auditing services.

We've used Concur in a local environment for years and have grown accustomed to it. The audit time depends entirely on how quickly the assigned person gets to the reports. We go through two levels, one internal at the department level and then at the corporate level. I receive notifications at each step. I've had one or two things questioned by the department, often just something I'd done wrong like attaching the wrong receipt images, never by corporate who I think just hits "approve." The interaction with the payroll process is also seamless and in cases where I've charged a non-allowable expense or when I'm claiming something I hadn't charged to the card the reconciliation is in my next [virtual] check.

We have a linked travel planning service that I never use (I'm glad its optional) as I find that the plane fare is always higher than I can obtain on my own and the hotel choices are limited. If I did use it those expenses would be charged directly to my travel account and wouldn't go through the purchasing card, but that's a minor benefit.

Expense inputting is fairly easy once you get used to it, although itemization can take some time but my assistant does it. There are a very few things that are hard to do, but not many. One example is a multi-day bill that includes a single charge for one expense with others broken out per ngiht so you need to divide it up yourself and then apply a portion to each night and then deal with any rounding left over.

Overall, I think it works fairly well.