Implementing SAP EP as a Central Portal for mulitple R/3 ECC Backends

Hello
We are trying to implement an Incident / Occurrence Management Solution for a Company with 6 different subsidiaries who run their own SAP ECC Backends which are geographically located in different parts of the country.
The idea is to implement a central SAP Enterprise Portal for these different subsidiaries and we would like to know if anyone has done anything similar before. So the idea is that anyone from these 6 different geographically locations can log an incident on the central portal and the data will be then updated on their own divisional ECC Backend.
Currently the SAP ECC Backends are based on ERP2005.
The Company itself has an Central Active Directory solution in place and single sign on could be used for authentication. All the subsidiaries already use the central Active Directory for authentication.
Could anyone please let us know whether they have done something similar or have any reasons why this cannot be done and some potential issues that could arise for implementing a solution like this.
Some potential issues could be:
System aliasing
Network connectivity, bandwidth, availability issues
Patch alignment etc
Would there be other issues that one would consider?
Thank you kindly.

Hi,
I dont see any issues with such a landscape. You can have content for each of this location based of the systems they access.
As u have said bandwidth, network issues and roles assignment would be concerns as they would be in a single ecc backend connected portal
Regards
Jayesh

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Implementing SAP EP as a Central Portal for mulitple R/3 ECC Backends

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