Absolutely !
The Access db contains information about building plans, quantities of materials, etc. It is also part of a franchise and we do not have direct access to their programmers and for what we are working towards, shouldn't need to.
The Sesame db is intended to track the whereabouts of any plan we have received, both within the current premises, and other locations round the country and oversea's and to show what stage of completion they are at. This is something that the Access db simply does not do. It only records Job Details and doesn't "track" where they are both location or stage of processing-wise.
The "updating" within the Access db is firstly to log the job in, then to do with the quantities of materials as they are imported from a sub-program a few days later, then modified if necessary before being provided to the client. (Job is logged in, then worked on using a separate program AND separate database, then that result is exported from the sub-program and imported back into the Access db for corrections and production of the final list for the client).
The Access database (unfortunately ?) is a legacy program that is still at the core of the business and auto-generates the Job Number which then needs to be imported into Sesame so that tracking of plan stages, which person, and which location, can begin, using a common number.
There are a few items of data to be imported along with the all-important Job Number, such as Merchant Name, Builders Name, Address of Building to be constructed, Name of Job and Merchants Request Number. Theres a few other fields as well. Because the Access database is what produces the Materials List, any changes to say spelling of the Merchants Name or changing the name of the job must be done in Access so the printed/emailed/faxed list back to the client contains the most relevant data. Thats a given.
Since we do not have write access to Access, we're looking at an Import both on a regular basis (say every hour?) and an ad-hoc when we know there have been changes to the Access db. We may structure our work a bit more for the changes being made to the Access database which is NOT updated every hour at present. There may be several Access db updates as a job, or 2 or 3, with changes is worked on, then nothing for an hour or two... or three

Hopefully this clarifies why we have some constraints re Access and Sesame.
We're using Sesame v1.1.5 and "looking" at going to v2 but would like to prove to the business' owner that purchasing Sesame was the right decision before he has to fork out more dosh ! This will be his first on-site Sesame application.
The Access db format is '97 which we very rarely get to alter. The original db's were provided on CD and unless specifically directed we are not permitted to change anything to do with them. We only have Office, with Access, on 1 PC in the business there is so little requirement for us to change anything in Access !