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Interop3 - Exhaustive data mapping
Verify that all the business data from the central source is visible for the user.
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Verify that the user is consulted when incoming data from the central source can not be processed. If possible, the user interaction is no solution, sufficient data should be stored to analyse the problem later.can't solve this immediately,
Interop5 - Input validation
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Verify that the processing of erroneous data on a server (where there is no immediate user interaction) is logged, monitored and eventually presented to the user.
Interop8 - Logging
Verify that enough information about manipulation of central and local data is logged to enable later analysis of possible problems.