Need info regarding reducing Idocs

Question

Hi,
Iam exteding ORDERS05 to ZORDERS05.
I need to remove segment E1EDS01 from this ZORDERS05.
i tried to reduce using BD53 tcode but it asks for reference message type and throws message saying not available in reduction pool.
pls sugest

Answer 1

ACLs, like Accounts, are optional security setting which may add on some extra functionality to mandatory security groups. Likewise, the resulting permission is taken as an intersection of SG and ACLs.
But in the second part the number of set of users is huge (approx say 600)I don't get this completely. Does this mean that those "sets of users" (users who see the same data) are distinct and that there is 600 of such groups?
If you read thoroughly the manual I sent earlier, there is a recommendation that there should be maximum 50 security groups, and you should use accounts, should this number be exceeded. This means you could have all the documents in one security group (and have one common role with Read permission), but combine it with accounts. ACLs are not a good choice here - their performance and manageability is much worse than of accounts. ACLs are primarily used if you expect security settings to change during the lifetime (e.g. a project manager adds temporarily rights to access an item to another user, and revokes it when the user finishes his or her work).
Note that accounts as well as permissions of users within accounts can also be mapped externally (from LDAP/AD) and it usually follows some kind of org chart.
I'd feel more comfortable not to speak about users, security groups, roles, etc., but about some real-life objects and scenarios.