# Limitations
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**Note**  
In an IDC implementation, when a Amazon Q Business knowledge base is first created in Amazon Quick, access to the knowledge base is automatically granted to users with access to the selected Amazon Q Business index. For additional users to have access to a knowledge base, the admin must configure user access in both the Amazon Q Business console and Amazon Quick knowledge base permissions pages.

When using Amazon Q Business indexes in Amazon Quick, be aware of the following limitations:

## General Limitations
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+ Amazon Q Business index knowledge bases cannot be changed like other knowledge bases in Amazon Quick.
+ Amazon Q Business index knowledge bases only support the docs types supported by Amazon Q Business.
+ QApps, Actions, and Amazon Q Business chat guardrails are not included in the BYOI capability.
+ Amazon Q Business indexes must be in the same Amazon account and region as Amazon Quick.

## IDC Implementation Limitations
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+ Both Amazon Quick and Amazon Q Business must use the same instance of IAM Identity Center.

## Index Quotas
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+ You can connect up to two Amazon Q Business indexes per Region to Amazon Quick in the current release.
+ This quota cannot be increased.
+ Once indexes are selected and saved in a Amazon Quick instance, they cannot be directly unselected.