E-Commerce Configuration Guide : Site Configuration Settings : Guest Related Settings : AllowMultiLogin
 
AllowMultiLogin
Key value:
0 or 1
Description:
Enables (1) or disables (0) multiple independent log-ins by a parent and his children. If set to 0, children of a parent are automatically logged out when the parent logs out. If set to 1, this behavior is overridden and multiple visitors/guests can be logged in at the same time.
 
Note: The setting AllowMultiLogin = 1 must be set to a value of 1 in order to keep the head guest as the first guest to be verified. If the setting is not present in siteconfig.config or is set to a value of 0, the head guest is always the last guest looked up and verified.
If an online visitor/guest uses the Guest Lookup link in the page header or page footer from either Checkout.aspx or Checkout2.aspx and a guest has not yet been set as the purchaser, that guest lookup is used to set the guest looked up as the purchaser for the sale and the online visitor/guest is returned to either the Checkout.aspx or Checkout2.aspx page depending on where they started from. If, however, a guest has already been set as the purchaser, going through the process mentioned above simply results in an additional guest lookup, but are not replace the existing purchaser. The above actions occur with the setting AllowMultiLogin = 1.
When AllowMultiLogin = 0 is set, any guest lookup from either Checkout.aspx or Checkout2.aspx via the Guest Lookup link in the page header or page footer results in the guest that was looked up being set as the purchaser, even if a purchaser has already been set.
See also:
ParentingLevel